US2908147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Room air conditioning apparatus having filter arrangement for independent operation
Assignee: General Electric Co
•
Filing: 1957-04-08
•
Granted: 1959-10-13
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 James H Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F1/00; F24F1/02; F24F1/029; F24F1/032; F24F1/0323; F24F1/0328; F24F1/035; F24F11/70; F24F11/72; F24F11/74; F24F11/80; F24F11/81; F24F8/00; F24F8/10; F24F8/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2736176A
Cited
US2451366A
Cited
US2502980A
Cited
US2540957A
Cited
US2768514A
Cited
US2724247A
Cited
US2810273A
Cited
US2720090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |